diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..59e0bf1
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "docs/libpsl/html"]
+	path = docs/libpsl/html
+	url = https://github.com/rockdaboot/libpsl
+	branch = gh-pages
diff --git a/docs/libpsl/html b/docs/libpsl/html
new file mode 160000
index 0000000..f219eb9
--- /dev/null
+++ b/docs/libpsl/html
@@ -0,0 +1 @@
+Subproject commit f219eb93eb24f488bbe0fe1da98d11505498b798